Sewing machine table motor mount



Sept 2, 1952 N. G. GODSHALL. ET AL 2,609,262

SEWING vMACHINE TABLE MOTOR MOUNT Filed July 5, 1951 2 sl-xEE'rs-sl-IEET1 Suvenors N/cHoL/:s G Coosmzz R0 Y Z.. MARKS (lttorneg SePt- 2, 1952 N.G. GoDsHALl. ET AL 2,609,262

SEWING MACHINE TABLE MOTOR MOUNT 2 SHEETS-SHEET 2 Filed July 5, 1951N/cHoL/Ls Q- GODS/ML; ROY' .MARIGS attorney Patented Sept. v2, 1952UNITED 's1-Ams PATENT GFFICE MACHINE TABLE MOTOR MOUNT Nicholas G.Godshall and Roy L. Marks, Ephrata, Pa., assignors to Walter W. MoyerCompany, Ephrata, Pa., a partnership Application July 5, 1951, SerialNo. 235,252

, 1 Claim. (Cl. 311-16) The present invention relates to afsewingmachine power table motor mount for the *mounting of one or more sewingmachines.

In well known types of sewing machine power tables, the motor fordriving the sewing machine is usually mounted at the rear of the tablewith provisions for adjustment thereof only in a longitudinal direction.An outstanding objection of this type of table is that it does notafford adjustment in a forward and rearward direction with theconsequence that a somewhat unbalanced condition of the table resultsgiving rise to vibration and noise. Andwhen machines of different typesare substituted, it is often necessary to change the attaching positionof the machine to the table top. Moreover, substantial lengths of beltmust be used to span the distance between the motor drive shaft andmachine drive shaft resulting in a greater slippage, less efficiency, aswell as necessitating the stocking of various sized belts. Additionally,the treadle rod connecting the ytreadle with the clutch of the motormust be disposed at an angle of perhaps less than 60, therefore onlysmall components of vertical forces applied to the treadle aretransmitted to the rod, thus requiring a great exertion of manual efforton the part of the operator for the clutch--` ing or declutchingoperation as well as imposing a greater amount ofstrain on the treadlerod, requiring frequentadjustment and replacement thereof. Horeover, asdifferent types of sewing machines are mounted on the table,particularly in the center or back half of the table, it is usuallynecessary to lcut a greater length of slot in a forward to rearwarddirection of the table in order to accommodate the angularity of thebelt.

An object of the present invention is to provide a novel sewing machinetable motor mount which is devoid of all of the above nameddisadvantages.

A more specific object of the present invention is to provide a novelsewing -machine table motor mount having a fully adjustable motormounting rwhich enables elimination of unbalance of the motor mountingand vibration of the table, and eliminates the necessity of long beltscr the carrying of a large inventory of various sized belts -also, whicheliminates the cutting of vlonger slots in the table for accommodatingbelts for different types of machine mountings.

A further specific object of the invention is to provide a novel sewingmachine table motor mount wherein the treadle rod may be disposed in asubstantially vertical direction, thereby minimizing strain on thetreadle parts and fatigue of the operator'as in the caseof conventionaltreadle designs-wherein the treadlerod-is disposed at a substantialangle'with respect to the treadle. f* f Y Other objects and advantagesof the present invention willfbecorne apparent from a study of thefollowing description taken with the accompanying drawingswherein: 1 -fFig. 1 is a top view of a sewing'machine table with the table toprer'novecl and embodyingthe principles of the present invention;

` Fig. 2 is a front elevational view of the sewing machine table shownin Fig. 1 but with the table top inplace; Y 'Y Fig. 3 is anendelevational View of the sewing machine shown in Figs. 1 and 2, and n1 Fig. 4 is a perspective View of the sewing machine table shown inFigs. l to 3.

Referring more particularly to Figs. 1 and 2 of the drawings, numeral ldenotes a table top which may be of wood, such as maple, or metal, asdesired, and which is supported by a metal framework of pressed steel orother sheet metal construction. The framework comprises four legs 2 ofchannel cross-section and a back brace 3 Whose ends are bolted orotherwise secured to the rearmost legs 'of the table as'shown moreclearly in Figs. 2 and 3. Telescopically fitted within legs 2v arecorrespondingly shaped channel leg extensions 2a which provide verticaladjustment of the height of the table I' by the mere looseningand thentightening of bolts 4, thereby clamping extensions 2a. to legs 2 inanydesired relative position. -A base'member 5 extending longitudinallyof the table has ends whichV are bolted or otherwise integrally securedtothe bottom, laterally extending braces 6, which, in turn, are securedto leg extensions2a` to forma rigid base structure.- 'f 'Y i Adjustablel'means' are provided-'for ,mounting 'a driving motor lVL 'which' meanscomprises a motor mounting 'baril preferablyof rectangular cross-sectionand having flattened AVend portions 1a providedvwith holes through`which bolts 8 may extend. Bolts Salso extend through slots-v9 formed onthe top ang'e of a pairof" adjustable motor mounting brackets'A l0preferably of angle iron construction havingperforated end flangesbolted to legs 2 by bolts l I. It will be seen, therefore, that byloosening bolts `8 so that they may freely slide in slots 9, motormounting bar 1 may be selectively moved in a forward or rearwarddirection to any desired position so as to bring the motor centrally,forwardly or rearwardly of the table.

In order to permit raising or lowering of the motor mounting .bar 1, aplurality of holes, such as IIa, are provided in the legs 2 of the tablethrough which may be extended bolts II which extend through the endflanges of the angle iron motor mounting brackets le, and in this wayenable a certain degree of vertical adjustment of the motor mounting,particularly for accommodating different table thicknesses. l

The motor is adjustable also in a longitudinal direction of the table bymeans of a slidably adjustable motor supporting bracket I2 which snuglysurrounds and is adjustably clamped to motor mounting bar 'I in anydesired longitudinal position by means of bolts 12a. By this and otheradjustments hereinbefore described, the motor may be slidably adjustedto any longitudinal or lateral position so as to properly position thedriving belt I3 by bringing the motor drive shaft as close as possibleto the sewing machine drive shaft in order to provide a smaller belt,less slippage and therefore greater efficiency of the drive, as well aseliminate the necessity of enlarging the slot I4 through which belt I3extends when different types of machines, such as S, are substituted, orwhen the sewing machine is to be mounted in different forward torearward positions of the sewing machine table. The electric motor M isprovided with a clutch (not shown) which is actuated by a clutch arm I5having adjustably connected thereto a treadle rod IS whose lower end isadjustably connected to a treadle II supported on the base member 5. AV-belt bracket take-up of any well known type may be used to adjust theslack of the belt.

It will be particularly noted that by providing adjustment of the motormounting in a forward to rearward direction of the table, it is possibleto place the motor directly above the treadle I'I and thus dispose thetreadle rod I6 in a substantially vertical direction, thus enabling theoperator to transmit a maximum amount of force to the clutch arm I5 ascompared to previous constructions wherein the treadle rod I6 had to bedisposed at a considerable angle, requiring substantially greaterphysical force to operate the clutch arm and causing considerable strainand, frequently, loss of adjustment of the treadle rod I6.

The electric motor may be controlled rfrom switch box I8 and energizedby any suitable source of power (not shown). A presser foot rod I9 mayalso be attached to the treadle and to the presser foot (not shown) ofthe sewing machine S to enable lifting of the presser foot of themachine as desired. K

Thus it will be seen that we have provided an eliicient sewing machinepower table incorporating motor mounting means having universaladjustment in longitudinal, lateral and vertical directions to enablethe .mounting of the motor in any desired position underneath the tableso as to bring it as closely as possible to the machine to be driventhereby, thus shortening the belt connection to the machine, eliminatingslippage and loss of efficiency; also eliminating the necessity forcutting large slots through the table top to accommodate different typesof machines, as well as permitting the disposition of the treadle rod ina substantially vertical direction so as to facilitate manual operationof the clutch arm and thus minimize fatigue of the operator, vibrationand noise. In short, we have provided a combination of elements whichprovides a wide range of adjustment of the motor mounting in a simplemanner and simplifies operation of the sewing machine and substitutionof different types of sewing machines so as to obtain maximum efficiencywith minimum manual eiort, therefore which will considerably increaseproduction of sewed goods.

While we have illustrated and described a certain specific embodiment ofour invention, it will be understood that this is by way of illustrationonly, and that various changes and modications maybe made within thecontemplation of our invention and within the scope of the followingclaim.

kWe claim:

yIn a'sewing machine power table of the type have a slotted table topsupported by a metal framework including four legs, an adjustable motormounting bracket construction for adjustably mounting a motor fordriving a sewing machine mounted on the top of and substantiallycentrally of the table and including a clutch and operating armtherefor; comprising, in combination, a motor mounting bar of squarecross section extending longitudinally of and in close proximityunderneath said top for adjustably mounting a supporting bracket of themotor in any of a plurality of positions longitudinally of the table,the ends of said bar being flattened and each having a hole extendingtherethrough, a pair of brackets extending transversely of the frameworkbetween said legs and each having an elongated slot extending throughouta large central portion thereof, and bolts extending through said holesand slots for adjustably mounting said motor mounting bar transverselyof the table, said legs having a plurality of vertically spaced holesfor mounting the ends of said brackets in selective vertical positions,a treadle mounted on the base portion of said framework underneath saidmotor, and a treadle rod interconnecting said treadle and clutch arm andextending in a substantially vertical direction so that force applied tothe treadle by the feet of the operator may be easily transmitted tosaid clutch arm.

NICHOLAS G. GODSHALL. ROY L. MARKS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Peterson Jan. 31, 1950

